Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nonlinear symmetrical centrifugal impeller with low-noise characteristic

A centrifugal impeller, non-linear technology, applied to the components of pumping devices for elastic fluids, non-variable pumps, machines/engines, etc., can solve the phase superposition effect of pressure waves and the influence of pump operation stability , pump body vibration and other problems, to achieve the effect of suppressing static and dynamic interference energy, suppressing superposition effects, and reducing vibration and noise levels

Pending Publication Date: 2021-01-08
JIANGSU UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, for the uniformly distributed blade structure, the pressure wave is prone to phase superposition effect, which will cause high-amplitude pressure fluctuations, induce vibration of the pump body, and even affect the stability of the pump operation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nonlinear symmetrical centrifugal impeller with low-noise characteristic
  • Nonlinear symmetrical centrifugal impeller with low-noise characteristic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] like figure 1 As shown, the blades are arranged in a nonlinear symmetrical manner, and the blades 1 are fixed on the cover plate 2. When designing cylindrical impeller blades and twisted three-dimensional blades, the blades adopt a nonlinear symmetrical arrangement along the circumference to figure 1 For example: the impeller has 8 blades, the first blade is used as the starting point, the angle θ between the second blade and the first blade is n is 37.5°, the angle between the outlet edge of the adjacent blade and the outlet edge of the previous blade gradually changes in a trigonometric function, and the sum of all angles is 360°. In this implementation, the maximum change angle A is 16.8°, and the function formula is:

[0017] θ n =45+16.8*Cos(8*45); ∑θ n =360°

[0018] Among them, n=1,2,3...8.

[0019] The specific implementation angles are shown in Table 1:

[0020] n θ n (°)

1 37.5 2 53.3 3 51.6 4 49.5 5 46.8 6 4...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an efficient nonlinear symmetrical centrifugal impeller with a low-noise characteristic, and belongs to the field of fluid machinery. A conventional uniform symmetrical impeller vane arrangement mode is broken through, the angle of the radius where the outlet edges of every two adjacent vanes are located is designed according to trigonometric function changes, the nonlinear symmetrical centrifugal impeller with the angles between the vanes meeting a periodic distribution rule is formed, the phenomenon of dynamic and static interference between guide vanes and an existing impeller is weakened, the pressure pulsation amplitude is reduced, and the superimposed effect of pressure waves is restrained. Therefore, the purpose of reducing vibration noise is achieved, and the comprehensive operation efficiency and operation stability of a pump are improved.

Description

technical field [0001] The invention relates to a high-efficiency nonlinear symmetrical centrifugal impeller with low noise characteristics, which belongs to the field of fluid machinery. Background technique [0002] Centrifugal pumps are widely used in the industrial field and are important fluid conveying equipment. In the process of designing a centrifugal pump, it is often necessary to design the pump as an impeller-guide vane matching structure according to the structure and design requirements. The matching characteristics of the guide vane body and the impeller directly affect the energy performance of the pump, and poor matching characteristics are very easy to create a gap between the impeller and the impeller. Large hydraulic losses occur in the guide vane flow path, which is one reason for the low pump efficiency. The traditional impeller blades are uniformly arranged in the circumferential direction, the liquid flow out of each flow channel is the same, and the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F04D29/22F04D29/24F04D29/66
CPCF04D29/2222F04D29/245F04D29/669
Inventor 张宁蒋俊贤高波倪丹
Owner JIANGSU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com